Shuttle changing filling mixing loom



@652, 6, 1%36 R, TURNER 2,05,$94

SHUTTLE CHANGING FILLING MIXING LOOM Filed. May 5, 1954 4 Sheets-Sheet 1Snuentow Richard (1.11m new (kit, 6, 1936. R TURNER 2,056,694

SHUTTLE CHANGING FILLING MIXIBKYLOQM Filed May 3, 1934 4 Sheets-Sheet 2L M noentov Riaham GTurner' Gd. 6, 1936. R TURNER 2,056,694

SHUTTLE CHANGING FILLING MIXING LOOM Filed May 3, 1934 4 Sheets-Sheet 35) noentor Richard G.Turner W7 (lttorneqs FIE 5 ct. 6, 1936. R. G.TURNER 2,056,694

SHUTTLE CHANGING FILLING MIXING LOQM Filed May 3, 1934 4 Sheets-Sheet 4gnoentor Richard G. Turner Q. torneqs Patented Oct. 6, 1936 UNITEDSTATES SHUTTLE CHANGING FILLING MIXING LOOM Richard Greenleaf Turner,Worcester, Mass., as-

signor to Crompton & Knowles Loom Works, Worcester, Mass, a corporationof Massachusetts Application May 3, 1934, Serial No. 723,730

18 Claims.

This invention relates to improvements in filling mixing looms and it isthe general object of the invention to provide a shuttle changing loomin which single picks of filling can be mixed.

When weaving a plain fabric in a loom operating with but one shuttleobjectionable shading is likely to result due to the fact thatsuccessive supplies of weft may not be exactly alike either as to sizeor color. Heretofore this has been corrected by using two or moreshuttles which run in alternation to mix their respective wefts. Whensuch looms have been made weft replenishing it has been customary toweave two picks of one bobbin followed by two picks of another.

Where very coarse yarns are used the variation in size is likely to beconsiderable, and with prior practice a ribbed effect may occur. Innon-automatic weaving it is customary 'to weave such a fabric on asocalled 2 by 2 loom having two shifting shuttle boxes at each end ofthe lay. The shuttles are picked in a regular sequence and follow eachother in rotation being each active for a single pick.

In rendering a 2 by 2 loom automatic as to weft supply, I prefer to usea shuttle changing mechanism rather than a bobbin changer. In mycopending application Serial No. 460,746 I show shifting shuttle boxesat each end of the lay, those at the magazine end shifting only at thetime of renewal of weft supply. Because of these boxes at the magazineend, I find that by adding to them an extra cell, I can operate in theusual manner for a 2 by 2 loom, and have an abnormal shift at the timeof shuttle change. This modification of a principle already proposed byme is found to operate satisfactorily. The three weaving shuttles allcarrying the same kind of weft arrive in regular order in the topshuttle box at the magazine side and can be replaced by shuttles drawnfrom the magazine. All the reserve shuttles in the magazine have weft ofthe same kind, so that a single stack of shuttles will suffice.

It has been proposed heretofore to use so -called pick and pickautomatic looms having provision for replenishing any one of severalshuttles where any shuttle can be active on any pick for one pick only,if desired. The sequence of shuttles already referred to is a specificcase of the automatic pick and pick type of loom referred to, examplesof which are found in Patent No. 1,674,860 of June 26, 1928 to Gordonand Patent No. 1,605,271, November 2, 1926 to Nelson. In such loom,where it is desired, the color can be the same for all the shuttles andpick and pick cloth can be woven automatically by two, three or moreshuttles depending upon the capacity of the loom.

Such looms are bobbin changers, however, and have certain undesirablefeatures. The shuttle is not threaded on the first pick across aftertransfer and because of this fact the weft is loose and is likely toleave a mark in the cloth. Furthermore, the outgoing bobbin will usuallyhave its trailing end threaded in the shuttle eye to be drawn back intothe shed on the first pick after transfer and there are likely to beshort double picks unless some special provision is made for handlingthe thread ends at the time of transfer. In bobbin changing looms alsoit is necessary to have a cutter in addition to the selvage trimmer, toremove the thread of the outgoing bobbin which remains threaded in theshuttle.

There is still another condition existing in bobbin changing looms whichrenders desirable an alteration in the change of the center filling stopmotion. In looms employing shifting boxes at both ends it is desirableto have a center stop motion to detect weft every beat of the loom, andthe stop motion should be as near the center of the cloth as possible,so that detection on all picks will be the same. The thread holder of abobbin magazine must be set back far enough to assist shuttle threading,and in many looms is in the same vertical plane as the fell of thecloth. As the lay moves backwardly the weft will be oblique with respectto the fell, starting from a point considerably behind the fell at themagazine end and leaving the shed at a. point much farther behind thefell on the side remote from the magazine. The tines of the centerfilling fork will ordinarily not be able to reach this pick should thestop motion be central of the lay, and in order to detect on thetransferring beat the stop motion is moved oil center in a directiontoward the magazine. This results in an uneven character of detection,permitting the fork to be held up by a short end extending in from themagazine end. Should the new thread break at transfer and a thread enddrawn in by the shuttle, such end might reach the offset fork to supportit, and a shift of boxes would permit weaving past the mispick.

When using shuttle changing looms the threading, pulled in ends,cutting, and stop motion defects are eliminated. The reserve shuttlesare fully threaded, hence the thread holder can be placed considerablyin advance of the fell, and the first pick after change will have thesame rela-- tion to the stop motion as all other picks. The center stopmotion can therefore be placed centrally of the cloth. In shuttlechanging looms the outgoing shuttle carries its thread with it, andthere is no necessity for cutting at any point other than at the selvagetrimmer. This latter can take place several picks after the change.Furthermore, there is no opportunity for pulled in ends.

In the loom described more particularly hereinafter there are twoweaving shuttle boxes at each end of the loom which cooperate with threeWeaving shuttles to place the shuttles in active position according to aregular sequence with each shuttle active for but one pick. A magazineof reserve shuttles is supplied at one end of the loom and there islocated at that end an auxiliary shuttle box which normally does nottake part in the regular sequence but which is placed in the path of adepleted shuttle which is moving toward the magazine. The means whichaccomplishes this placing of the auxiliary shuttle box also moves one ofthe regular weaving boxes into a, position where it can receive a freshshuttle from the magazine. The general shuttle changing operation may besubstantially the same as shown in my previously mentioned applicationbut one of the weaving shuttle boxes will be located between theauxiliary box and the box which receives fresh shuttles from themagazine.

It is another object of my invention to extend the interval of completeshuttle change so that the movement of the boxes at the magazine end ofthe loom will be short and this result I accomplish by operatingaccording to a method whereby a shuttle can be picked from the magazineend during the interval occupied by shuttle change, this shuttle beingpurposely located at the magazine end to facilitate shuttle changealthough it takes no part in the actual exchange of shuttles.

With these and other objects in view which will appear as thedescription proceeds, my invention resides in the combination andarrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings wherein a convenient embodiment of myinvention is set forth,

Fig. 1 is a side elevation of the detector end of the loom, the shuttleboxes and part of the lay shown in section,

Fig. 2 is a side elevation of the opposite side of the loom showing asingle color magazine, with parts in section,

Fig. 3 is a view similar to the upper part of Fig. 1 but with thedetector in a different position,

Fig. 4 is a plan view looking in the direction of arrow 4, Fig. 3,

Fig. 5 is a diagrammatic view showing a series of shuttle relationssetting forth the normal sequence in which the shuttles are picked,

Figs. 6 and '7 show the structure set forth in Fig. 2 in differentpositions and on a smaller scale,

Fig. 8 is an enlarged vertical section through the shuttle boxes andpart of the lay at the magazine end of the loom,

Fig. 9 is a front elevation in the direction of arrow 9, Fig. 8, and

Fig. 10 is a detail vertical section on line Ill-l0, Fig. 2.

Referring particularly to- Fig. 1, I have shown a loom frame If! and alay ll moimted on swords l2. A top shaft l3 moves connectors M toreciprocate the lay. A pair of upper and lower shuttle boxes l6 and II,respectively, are mounted on the upper end of a box rod !8, the lowerend of which is connected to a lifting link l9 operatively related to acam lever 29. The lever is pivoted at 2! to the loom frame and has aroll 22 to cooperate with a box lifter cam 23. The latter moves with agear 24 mounted on a stub shaft 25 and meshing with a gear 26 of halfits size on the bottom shaft 21 of the loom. By means of upper and lowergears 28 and 29,

left hand part of Fig. 1 the cam 23 completes a rotation every fourpicks of the loom. This cam has a high dwell 30 and a low dwell 31connected by inclines 32. The effect of the cam 23 is to hold the boxes[6 and I! in elevated position with respect to the lay for two picks andthen to permit the boxes to move down for the following pair of picks.In this way each shuttle box is rendered active for two consecutivepicks and then inactive for the next two picks.

Referring particularly to Fig. 2, the bottom shaft 21 has mountedthereon at the other side of the loom another box lifter cam 35 havinghigh and low dwells 36 and 31, respectively, connected by inclines 38. Acam lever 39 similar to lever 20 is pivoted at 40 to the loom frame andis connected to a two part link 4!. This link cooperates with a stud 43on the lever 39 and is pivotally connected indirectly, as at 44, to thebottom of the lifter rod 42. The cam 35 moves with a gear 41 meshingwith a gear 48 of half its size, and since the latter gear is secured tothe bottom shaft 27, the cam 35 makes a complete rotation every fourpicks of the loom.

The cam 35 is set so that its inclines 38 operate to shift top andbottom boxes 5!! and Bi supported by the rod 42 at a time when the boxesshown in Fig. 2 at the opposite side of the loom are at rest. In otherwords, the cams 23 and 35, while each rotating in four picks of theloom, are operative to shift their respective boxes at different timesso that the boxes at one end of the loom are at rest with respect to thelay while the boxes at the other end are shifting. I do not wish to belimited to this particular mode" of setting the cams 23 and 35 in thepractice of all features of my invention, but I have found that theshuttle sequences produced by such a shift are convenient for thepurposes of my present invention.

In Fig. 5 there are set forth 12 different positions of the shuttleboxes, together with three weaving shuttles which are placed in pickingposition by the boxes according to a definite sequence. The shuttle raceR is indicated diagrammatically as defining the path along which theshuttles travel across the loom. Pickers P and picker stick S areindicated diagrammatically in Figs. 1 and 2 to propel the shuttles whichare in picking position, as usual.

For purposes of description, it may be assumed that the shuttles andboxes start as shown in position I, Fig. 5, where shuttles S and S areat the right hand shuttle changing side of the loom with boxes 50 and 5|in low position, and shuttle S is in the low box I! at the oppositedetecting side of the loom, shuttle box IE being opposite the race readyto receive a shuttle. The positions shown in Fig. 5 are indicated withthe lay approximately at bottom center, at which position the activeshuttle is supposed to have been just boxed so that the shifting of theshuttle boxes can start.

The box shift which follows the bottom center indicated in position Iplaces the boxes and shuttles in position II, where the boxes at theright hand side are raised so that shuttle S can be picked into box 16,leaving box 5| opposite the race.

On the next shift of boxes indicated in position III the left hand boxesrise so that shuttle S can be picked into bottom box I, leaving box I?opposite the race.

As shown in position IV the left hand boxes remain up but the right handboxes have been lowered so that S can be picked from box 5I which isleft opposite the race into the left hand box II.

Position V shows the left hand boxes lowered so that shuttle S is movedinto action and is picked to the right into the top box 50.

Position VI shows the right hand boxes raised to position shuttle S forpicking into the top box I 6 at the left hand side.

In position VII the left hand boxes have been raised to pick shuttle Sto the right side into box 5i, leaving box I! opposite the race.

In position VIII the boxes at the right hand side are lowered andshuttle SS is picked from box 59 across to the left hand lower box II.

In position IX the right hand boxes remain in down position but the lefthand boxes are lowered so that shuttle S can be picked out of the topleft box It into the top right box 59.

In position X the right boxes are raised so that shuttle S is pickedfrom box 5I to the left hand upper box I6.

In position XI the left boxes are raised to place lower box I? oppositethe race so that shuttle S can be picked from it into the lower box 5!at the right hand side.

In position XII the left boxes are retained as they were in position XIbut shuttle S is placed opposite the race by lowering the right boxesand is picked into the bottom box I I.

Position XIII is the same as position I and it is therefore seen thatafter a sequence of twelve picks the shuttle gets back into the samerelative position with respect to the shifting boxes.

It will be seen by inspecting the different positions of Fig. 5 that atregular intervals each shut tle will appear at a given point or positionin the sequence. As shown in position IV, for instance, shuttle S is inraised position in box I6 and four picks later shuttle S is in box It inraised position as shown at VIII, and in position XII shuttle S is inthe raised top box I5. This sequence of shuttles is well-known innon-automatic looms and is used for instance in looms for weaving papermachinery felts and also on cam worsted looms. It will be seen that eachshuttle is active for but one pick at a time. An auxiliary shuttle box99 is shown diagrammatically in Fig. 5 but it is normally inactive anddoes not enter into the normal sequence.

The detecting mechanism shown in Figs. 1, 3 and 4, comprises brackets 65secured to the lay and extending backwardly therefrom to support smallshaft 66'. Detector arm 61 is secured to the shaft 65 and has a detector68 through the body of which extends a pair of electric detector prongs69 and ID, respectively, insulated from each other by the material ofwhich the body is made. These prongs are indicated in Fig. 4 asconnected electrically to lead wires II and I2, respectively, and whenthey are electrically connected at weft exhaustion, the followingcircuit is established, see Fig. source of electric power E, lead wire"I2, prong I9, metallic ferrule 86 on bobbin 85, prong 69, lead wire II,solenoid I3, and wire 74 back to the source E. This energization of thesolenoid initiates a shuttle change motion of parts to be described.

In order to time the operation of the detector there is secured to theinner end of the shaft 66 an actuating arm i5 attached to the upper endof an operating rod I5. This latter rod is connected to a lever 11, seeFig. l,.having a roll I9 to rest on a cam I9. Cam I9 is secured to theshaft 25 and completes a rotation every four picks of the loom and thiscam has a high dwell 89 which may extend around the greater partthereof. A low dwell 8i is so timed with respect to the box movements atthe detector end of the loom as to dip the' detector into the topshuttle box I6 when the lay is rearmost just preceding that position of.the sequence in which box It is to move down from inactive to activeposition. The shuttle contained by box I6 will therefore berendered'active to be picked across to the magazine side of the loomshortly after its con dition of weft has been detected.

The time of starting the descent of the detector need not be exactly asdescribed, but should be such as to permit completing of the circuitalready described in sufficient time to permit energization of thesolenoid some time prior to the time that lifting of the boxes at themagazine end of the loom can start. While I have designated thisposition as with the lay at back center, yet it could if desired occurwhen the lay is at some point between top and back center.

It is to be understood that the downward movement of the boxes will pullthe exhausted shuttle away from the detector and that the box IE will bein low position for two picks. Hence there is no necessity for a quickreturn of the detector to its elevated inactive position. Thisrestoration of the detector to its normally raised inactive position canoccur at any time prior to a subsequent rising of a shuttle in box I6.

At the opposite end of the loom from the detector there is provided ashuttle changing mechanism including a magazine M having a single stackof reserve shuttles SR arranged one over the other. This magazine may besupported by a bracket 99 secured to the loom frame and the lowermostshuttle rests on a platform or plate 9I swinging about pivot 92 on themagazine. A set screw 93 on lever 94 which pivots about center 92andcarries the plate BI is positioned for engagement with a boss 95secured to the shifting shuttle box structure which includes the cells59 and 5|. The previously mentioned auxiliary shuttle box 50 is locatedbelow the cell 5| and all three of these boxes or cells are supported byand give vertical movements through action of rod 42. A light Spring 96acts to move the plate 9i back to normal position after transferringmovement.

A single binder 91 is substantially fixed to the.

lay to cooperate with the shuttle box which is in active pickingposition, see Figs. 8 and 9. The binder has top and bottom horns 98 and99, respectively, which cooperate with the cells above and below therace plate R.

A box cover I99 for cell is pivoted as at IDI to a part of the box andhas a lug I02 to engage a cam I03 on the magazine frame when the boxesare in their highest position.

Box rod 42 normally receives movements from the cam 35 to shift cells 50and 5| so that they will take part in the previously described sequencebut this rod is also subject to an additional lifting movement at'thetime of shuttle change through the action of a lifter latch I95 pivotedto a regularly moving lever I96 moving about the center 49. Lever I96 ismoved by a cam Iil'I secured to the shaft 25 so that it completes arevolution every four picks of the loom. This cam is shapedsubstantially as shown in the lower part of Fig. 2 and has a low dwellI08 which holds the latch downv when the shifting shuttle boxes 50 and5! are in their low position. The cams 35 and I0! turn in the directionindicated at arrow a, Fig. 2, and a lifting surface I09 on cam I01 leadsfrom the dwell I08 to a high dwell lie. The cams are so related that thelifter surface I09 comes into action to elevate the latch during thosepicks of the sequence when cell 553 would normally be in line with therace to receive the shuttle coming from the detector side of the loom.

In operation, the pairs of weaving boxes at the two ends of the loomwill shift in regular order to render the three shuttles active asdescribed. Every fourth pick the detector will descend when there is ashuttle in box 16 and the latter is raised. This may occur, forinstance, when the loom is between the positions III and IV just beforethe detected shuttle becomes active. The latch IU5 and its lever riseregularly at four pick intervals, being all the way up when the shuttlefrom box IE reaches the magazine side. So long as enough weft is presentin all the shuttles this sequence continues without interruption.

When an empty shuttle is raised by box I6 toward the detector and thelatter has descended, a condition will exist such as that shown inposition VIII of Fig. 5, where it is assumed that shuttle S is beingdetected and is depleted. The detector will act to close the previouslytraced circuit and cause the solenoid to throw the latch from the fullto the dotted lines in Fig. 10, the latch and its lever being in lowposition at this time. During the time that the lay is in the forwardhalf of its movement and when shuttle S is being lowered from positionVIII to position IX there will be simultaneously a raising of the boxesat the right hand side of the loom so that boxes 50, 5| and 60 will bein the position designated at IXA, Fig. 5, with auxiliary box 60 alignedwith the race. The depleted shuttle S will therefore enter this latterbox when arriving at the right hand side of the loom.

It is to be understood that the shuttle is picked when the lay is movingrearwardly and in socalled top center or midway position and that theboxes are in the position IXA prior to the picking. As the lay movesrearwardly, therefore, the projection I02 will be placed to engage camI03 to lift the cover of the box 50 and lug will be placed toengage thescrew 93 to move the plate 9| rearwardly, and as the lay reaches itsrearmost position the bottom reserve shuttle of the magazine will dropinto the top box 56. It is this box 50 which shuttle S would normallyenter were its supply unexhausted, and it will be seen therefore that byapplying a fresh shuttle into this box the sequence can be reestablishedafter the temporary interruption accompanying shuttle change.

The boxes at the magazine end of the loom will remain in their highestposition until the lay reaches bottom center, after which these boxeswill be lowered one step by action of surface H2 on cam ill! and leverwe so that box 5! is aligned with the race. Since shuttle S was lastpicked it is now the turn of shuttle S to be picked and this shuttle isin the middle box 5!. This onestep down motion, which is as slow andeasy as the usual box shift will therefore place shuttle S in pickingposition so that it will be driven to the left hand side of the loom asindicated in position X. The boxes at the magazine side of the loomremain in this position for another pick, lever 39 having returned tohigh dwell 35 to be supported thereby as the latch continued down, sothat shuttle S can be picked back to the magazine side as indicated inposition XI, whereupon box 50 is lowered to render new shuttle S active.

It is this downward movement of the boxes to place the freshly insertedshuttle into action which lowers auxiliary box 613 and depleted oldshuttle S to discharging position below the depending prongs of thebinder. On the forward motion of the lay, therefore, the depletedshuttle will be ejected forwardly into any form of receiver not shown.This particular mode of ejecting the exhausted shuttle, as well as themechanism for applying a fresh reserve shuttle to the box 50, may be asset forth in my co-pending application Serial No. 460,746 and themagazine and associ ated parts may if desired be more particularly asshown in Chevrette. Patent No. 1,834,302.

During the actual transfer of the shuttle from the magazine to the box50 the lowest reserve shuttle together with all those resting on it willdrop when the plate Si is in back position. As the lay moves forwardly,however, the plate 9| will advance to move under the next lowestmagazine shuttle before the latter is entirely unsupported by theshuttle being changed.

While I have shown the weft detector as associated with the top box onthe left hand side of the loom, yet I am not necessarily limited to thisposition of the detector inasmuch as it could be placed to detect in thebottom shuttle on the left hand side if desired. A correspondingreversal of the movements of the boxes at the right hand side of Fig. 5would place the shuttles correctly for operation under this alternativearrangement. The point to be. borne in mind is that the shuttle which isbeing detected when next active should be picked into the top box at themagazine side of the loom.

From the foregoing it will be seen that I have provided a shuttlechanging loom wherein each of three shuttles is active for but one pickat a time according to a predetermined normal sequence and that meansare provided for interrupting this sequence at the time of weftexhaustion to move one. of the normal weaving boxes which is temporarilyempty into receiving relation with respect to the magazine, and to placea normally inactive auxiliary box in position to receive the exhaustedshuttle. By two separate subsequent single box downward motions theboxes at the magazine side. act first to permit picking of the shuttlewhich is in box 5| and unaffected by transfer and then the freshlyinserted shuttle is rendered active and the depleted shuttle expelled.These two steps avoid a quick two box shift which might interfere withproper shuttle changing motions. The outgoing shuttle is moved forwardlyso that its thread which extends to the selvage does not cross the pathof the active shuttles, and the freshly inserted reserve shuttle isfully threaded so that the tension of the first pick is normal. Noselvage cutter has been set forth herein but any of the well-knownmechanisms of this type can be employed and can be set to cut at anydesired time without regard to the replenishing interval.

I have found that under certain conditions the shuttles which are inboxes 50 and 60 may tend to move inwardly toward the cloth when theseboxes are not opposite the stationary binder. In order 9. In a shuttlechanging loom operating with three weaving shuttles all containing weftof the same kind, a magazine of reserve shuttles all having weft of thesame kind and located at one end of the loom, a pair of shifting shuttleboxes at each end of the loom, means to move the boxes at the magazineend of the loom toward and from the magazine in a normal sequence ofmovements of the boxes at both ends of the loom by which the shuttlesare rendered active in r0- tation for but one pick at a time, andadditional means dependent upon exhaustion of weft in the weavingshuttle to give the boxes at the magazine end of the loom an additionalmotion toward the magazine to render the latter operative with respectto one of said boxes at the magazine end of the loom.

10. In a shuttle changing loom operating with three Weaving shuttleswhich are active in rotation and each for but one pick at a time, amagazine of reserve shuttles, a pair of shifting shuttle boxes at thatend of the loom adjacent the magazine, normally acting means to givesaid boxes shifting movements to assist in placing the shuttles inactive position in rotation, and other means to give said boxes anadditional motion at the time of weft exhaustion of the active Weavingshuttle and move said boxes to an operative position with respect to themagazine.

11. In a shuttle changing loom operating with three weaving shuttleswhich are picked in rotation so that each shuttle is active for but onepick at a time, a reserve shuttle magazine, a lay having a shuttle race,three shuttle boxes on the lay adjacent the magazine, regularly actingmeans to move two of said shuttle boxes into alignment one at a timewith the shuttle race during normal operation of the loom, andadditional means dependent upon substantial exhaustion of weft in theactive shuttle to move the third shuttlebox into alignment with theshuttle race to receive the depleted shuttle.

12. In a shuttle changing loom operating with a plurality of weavingshuttles any one of which may become active, a set of shifting shuttleboxes movable in a regular sequence to place each box in activeposition, one at a time, to receive a weaving shuttle, the boxes ininactive position capable of holding an inactive weaving shuttle, areserve shuttle magazine, and means controlled by weft exhaustion in anyweaving shuttle to interrupt the regular sequence and move one of,

the shuttle boxes of the set toward the magazine in position to receivea reserve shuttle.

13. In a shuttle changing loom operating with a plurality of weavingshuttles any one of which may become active, a set of shifting shuttleboxes movable in a regular sequence to place each box in active positionto receive a weaving shuttle while the other boxes are in inactiveposition, the boxes in inactive position capable of holding an inactiveweaving shuttle, a reserve shuttle magazine,iand means controlled byWeft exhaustion in any weaving shuttle to interrupt the regular sequenceand move one of the shuttle boxes of the set to an abnormal positionnear the magazine in positionto receive a reserve shuttle.

14. In a shuttle changing loom operating with a plurality of weavingshuttles each of which may become active, a set of shifting shuttleboxes movable in a regular sequence to place each shuttle box inposition to cooperate with the active weaving shuttle, an auxiliaryshuttle box moving with the set in the regular sequence and normallyheld out of position to cooperate with an active weaving shuttle whilethe shuttle boxes are moving according to said regular sequence, areserve shuttle magazine, and means dependent upon exhaustion of weft inthe weaving shuttle to interrupt the normal sequence of movements of theshuttle boxes and move one of the boxes of said set into an abnormalposition to receive a shuttle from the magazine and at the same timemove the auxiliary shuttle box into active posi tion to receive anactive weaving shuttle.

15. In a shuttle changing loom operating with a plurality of weavingshuttles any one of which may become active, at set of shifting shuttleboxes movable in 'a regular sequence so that all but one of said shuttleboxes is movable to active position to receive an active weavingshuttle, a reserve shuttle magazine, and means dependent upon exhaustionof weft in a weaving shuttle to interrupt the normal sequence ofmovements of the set of shuttle boxes and place one of said shuttleboxes in an abnormal position to receive a reserve shuttle from the-magazine and at the same time place said one shuttle box in position toreceive an active weaving shuttle.

16. A shuttle changing loom operating with a plurality of weavingshuttles each one of which may become active, a set of shifting shuttleboxes movable in a regular sequence so that all of the shuttle boxesexcept one is movable to active position to receive an active weavingshuttle, and means controlled by weft exhaustion in any weaving shuttleto interrupt the regular sequence of movements of the set to operativelyrelate one of the shuttle boxes with respect to the active weavingshuttle and place another box of the set in an abnormal position toreceive a reserve shuttle.

17. In a shuttle changing loom operating with a plurality of weavingshuttles any one of which may become active, a set of shifting shuttleboxes, pattern mechanism to cause said boxes to shift in a givensequence, each of said shuttle boxes capable of being in active positionand only one shuttle box being active at a time, shuttle changingmechanism, means actuated by depletion of a weaving shuttle to call anoperation of the shuttle changing mechanism, and mechanism controlled bysaid means and additional to the pattern mechanism to interrupt thegiven sequence and give one of said boxes a movement to active positionto receive the depleted shuttle, said movement of the boxes being out ofsaid given sequence.

18. In a shuttle changing loom operating with a plurality of Weavingshuttles any one of which may become active, a set of shifting shuttleboxes each capable of moving to active position, mechanism to cause theboxes to shift in a given sequence, a magazine to supply a reserveshuttle, detector means to indicate weft exhaustion in any weavingshuttle, and means under control of the detector means to interrupt thegiven sequence and move one of said shuttle boxes to a position toreceive a reserve shuttle from the magazine, the last means effective tomove the same one box to reserve shuttle receiving position regardlessof which weaving shuttle causes indication of Weft exhaustion.

RICHARD GREENLEAF TURNER.

